Seaweed

No side effects have been reported when using sargassum seaweed in recommended dosages.

All adult frogs are predatory and eat mostly insects. Larval frogs however (tadpoles) often eat freshwater algae. There are no frogs that live in the sea however, and so no frogs nor tadpoles eat seaweed.

The purple sea urchin is devastating kelp forests.

yes they do many pregnant crayfish aka crawfish will eat algae

Stipes are basically stems of the kelp. hope this helped :)

Agar agar it is like gelatine and used in desserts and soups

Most toothpaste is made from inorganic chemicals that may have biological sources. Seaweed is a source of alginate, and red seaweed is sometimes used to produce carrageenan, a thickening gel. Both of these may be found in toothpaste.

Hawaiian

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Americans, Polynesian, Japanesse, Eskimo, most any group that lives on earth. Several widely used food additives come from seaweed or different kinds.

"your hair looks like seaweed" is 'tes cheveux ressemblent à des algues' in French.

Seaweeds are classified into three major groups; the green algae, the brown algae, and the red algae. Placement of seaweed into one of these groups is based on the pigments and colouration existing in the plant. Other seaweed features that are used to classify algae include: cell wall composition, reproductive characteristics, and the chemical nature of the photosynthetic products. Plant structure, form and shape are additional characteristics used to classify seaweed.

No. Unfortunatley, you can not eat seaweed because generally it contains such high amounts of iodine that it would make the reaction you have to the substance much more intense.

You might find this medical explaination interesting for an individual lacking iodine:

Seaweeds have a salty taste that is an indication that the material can disperse phlegm accumulation, particularly as it forms soft masses, include goiter, the thyroid swelling that indicates severe iodine deficiency. Thus, seaweed is enriched in with iodine and you can not eat it.

of course it is. Halal is everything except pork and gelatin in food Salaam. It is very dangerous to say HALAL IS EVERYTHING because it is wrong, halal is only that animal that has been sacrificed and slaughtered in the Islamic method but that animal also has to be one of the chosen animals that we are allowed to eat for example a cow and a pig, we are allowed to eat cow but only if its slaughtered in the Islamic way, if its just killed any other way then that specific cow is haraam for us to eat but a pig we are not allowed to eat so even if its slaughtered in the Islamic method its still haraam for us. Yes gelatin is also haraam. Salaam
Yes, it is kind of sea food that is halal to eat and allowed for Muslims to eat.

A type of brown seaweed, moderate in size.

The simplest of the seaweeds are among the cyanobacteria , formerly called the blue-green algae, and green algae (division Chlorophyta ), found nearest the shore in shallow waters and usually growing as threadlike filaments, irregular sheets, or branching fronds. The brown algae (division Phaeophyta ), in which brown pigment masks the green of the chlorophyll, are the most numerous of the seaweeds of temperate and polar regions. They grow at depths of 50 to 75 ft (15-23 m). The red seaweeds (division Rhodophyta ), many of them delicate and fernlike, are found at the greatest depths (up to 879 ft/268 m); their red pigment enables them to absorb the blue and violet light present at those depths.

Seaweed do not have to live in water all the time - think of inter-tidal periods when they are not in the water. Only some kinds of moss live in the water. Many kinds of mosses never live in the water - but do tend to live in a damp environment. The underlying concept to think about is dessication.

Kelp

The kelp uses the sea urchins to keep it in check, from growing too much. However, the sea urchins eat kelp, so they destroy kelp growth. Also, sea otters eat urchins, and they live in the kelp forest.

seaweed is alive like all things on the planet

Piranhas don't live in seas or oceans, they're a freshwater fish found in rivers in South America.

I'm pretty sure seaweed contains chlorophyll I mean, it's green, right? So I'm going to say yes it does.

Seaweed does contain chlorophyll, chlorophyll is what makes a plant green and it is needed for photosynthesis to occur. The process of a plat producing it's food.

Seaweed is a living organism. It is a eukaryotic protista.

The leaves are full of oxygen that makes the kelp plant want to float to the top nod the water

"Seaweed" is loose colloquial term for macroscopic multicellular algae. Algae, however, are not even plants but are protists. "Seaweed" plants would be correctly termed aquatic plants to which both vascular and non vascular aquatic plants exist.